tv [untitled] March 2, 2011 2:00am-2:30am PST
at,m oren, county the water district serves about 230 thousand people in that county and it's an agency that almost ran out of water in the 1977 drought and despite major investments in imported water supplies and water recycling the fact is they have been operating in a water supply deficit. thankfully for that period we've almost always had above average rain fall. if that occurred today, those residents despite all their plumbing facilities and other efficiency measures would have to reduce demand an additional 70 percent in order to keep from running out of water. the
choices faces, them like many in the west are not easy and certainly not cheap. you're going to find a common thread the area of cheap and easy solutions to water supply is over. consider the fact that,mufd, is sponsoring around 8 hundred dollars an acre foot if any of you are paying more than that for incentive programs i would love to know but that probably is setg the pace. the district is considering a plant on san francisco bay to diversify it's water supply, portfolio and supervise a hedge on patterns that are likely to get even more volatile with climate change.
yes, it's expensive but how do you value wet water in a critical drought and is that drought in 77 the droughts we should be planning for. these challenges are compounded by the fact that our environment and fisheries need water too. my work at,nrdc, taught me most california streams and rivers need more water now to support healthy eco systems. one of the victims would be a beautiful north coast stream which in addition to providing most of,m oren, counties water supply endangers cohost salmon. if it doesn't fix it water regulator many the next drought may have to choose between the
thirst of 2 hundred people and continued existence of this fishery. we face this on our greater scale with the pay delta in ecological collapse in the last decade. we know the collapse in any number of emergencies we're going to lose a number of facilities and it may be rendered by a moderate rise in sea level and future realize on increases diversions. in light of all this, we ask how should water managers best respond to the threat of global warming. my first hope is that water managers get on the front edge fight against this.
your not bush administration scientists and nobody will stop you from talking about that. this panel invited us into a very unsettling way of framing the discussion those of us steeped the fight. we assume this is inevitable and we're focussing entirely on how to respond to it's impacts. this is a discussion that we absolutely must have because we're in a race against time. as we know, we're already feelg the impacts of global warming and things going to get worst before better so its the job of global managers to plan for the worst and that's what we're here to talk about today. among the issues, what impacts are we most concerned about, what adaptations are necessary and what models or in the
analysis are they planning to do and what initial things do they need for future decisions. our discussion takes place against a political backdrop here in california where leaders in both parties recognized the importance of including global warming in our strategies you know the governors water proposal called for 4 and a half billion dollars. sites reservoir and tell mperance river. together these would provide five hundred thousand acre feet of water supply but their being promoted as tools to provide flexibility against hydraulic changes due to global warming.
democrats have also unleeched a plan that does not include new damages. the senate package has ground water storage reoperation of storage and it's promised as a cheaper and faster way to address the problem with. these high stakes hanging in the balance we're blessed today to have a world class panel of water managers the folks that make some of the toughest decisions for the some of the biggest water facilities on the west coast. chuck clark the director of seattle public utilities. edward for the portland water bureau. marine stapleton for the san die ae go and less tear from water and wally bishop the contra water d district. each panelist will have a
chance to speak and ten minute time limit is a little like global warming. it sneaks up on you and then it's hard to deal with there that end. we'll try to reserve of for questions and answered that end. thanks. >> thank you jarrod and i will go through this quickly and i hope there's sufficient teasers in there to get you to ask questions as we get near the end. cautionary notes this is the system of seattle system, not your system. you have to look that principals and see if they apply to the same work the planning side, the modeling side, the adaptive side and i'll talk briefly for a few
seconds on mayors initiative on climate control because it gives an as political environment to work in and then the seattle system. the mayor of seattle nickels started the protocols for the city and started process with a lot of other mayors to start aggressively dealing with climate change if your interested at the bottom we have the website where there was an advisory commission made up of a number of corporate entities including starbucks and boeing and they came up with a plan for seattle the materials are there and if your interested i encourage you to go ahead and look at those and see the things being done with other mayors across the country. >> our system, we have two
water supply systems the cedar system and toll system that supplies one third and we own the entire head waters on 90 thousand acres and we control that and it's secure so it allows us to not filter that supply and the toll system we own 15000 acres around. so wcontrol a majority of our system which gives us a little flexibility in the way we design and manage our system and allows experiments that we could not do in other areas. again, 90 thousand acres, most of our reservoir gets a hundred thousand precipitation
dependent water supply. we don't have multi-year storage so we depend on that's a rain. for us, there's a number of adaptive strategies we've been trying to figure out to invest in to deal with consequences of climate change. one of the first is to try and figure out how to get rid of as much uncertainty as we can. we know we can't get rid of the uncertainty of why mate change but were there other things that we can start minimizing now so future water managers are not going to deal with those as an uncertainty in their portfolio. what does that include? it includes like in the last year we settled a 50 year debate with an indian tribe that cost
us about 40 million dollars and set minimum flows to deal with fish needs and water needs some we took an issue sitting in the courts and took that off of the uncertainty side and made it have a certain relationship with it. we're reexamining whether we should go back and do fill trabs not from the stance of a quality standpoint but two o to three years we divert the water plant, can we invest and get the operator the ability to not have that water. so that in the future they have more surety in what they're going to be able to do to manager the system. you ought to be pulling apart your systems to see that person that has to make those decisions every day. what can you provide them with
tools to make those decisions we have temporary pumping stations that get floated out on the reservoir. we're look at investing in permanent pumping things. if you have a permanent pumping station it takes you 24 hours. ten years back we would not have thought that was very important. now we're looking how to give the operator the flexibility to respond in 24 hours the results of operateg the system. we upgraded the entire information system to try and go real time in a much more aggressive way throughout the system to have that real time control over the operation. if we can get more and more of the daily issue us eliminated then their not so critical to
our success. we have, you know we're looking at down sizing a lot of our buildings internally and lead standards have been adopted we're trying to test the system. two years ago we took the total reservoir and drove it 25 feet lower than it had ever been driven before. we did it on purpose because we had models that said this is what happens if you drive it that low and we really did not know. so we drove it and experienced the worst of all conditioned which was 9 inches of rain and wind storms on newly exposed reservoir bottoms. we saw the consequences of the model verses the sedimentation of the water supply and they were about the a fifth of what the model was so now we can
draw it lower than we ever have before if we need to you need to look at those opportunity to test your system. we've modified the temperatures to so we're taking it from three different levels and we have that ability with our intakes? why is that important? in the future we're dealing with fish flow and temperatures and streams. historically we took the water off the top that's the hottest we're now trying to mimic controlled stream conditions in other areas again, to give us flexibility and less uncertainty in the future to manage the system. we're push together find out what can the system really do and how can we really maximize it's use as we look forward if we don't do that we're not going to be effective in the resources we currently have. many of you have probably seen
this and it's really an uncertainty chart. how do you deal with forecasting climate change. it's davids chart but part of it is, it's easy to do the bottom up stuff. what are our vulnerabilities and it's much harder taking global weather data and making it regional united states weather or climate estimates making it state or regional,est makeses and you have a realm of scenarios of a million or havea million because depending on the input, you're out puts give you all kinds of scenario. there was question today on sea rice. i can give you 50 that might be
effective. how do you man to search scenario. this talked a little bit more about some of the work that's done and i'll move on. keep going to the next slide. this is what we did - some work with washington so to say with the best information we have now available and we looked that range of alternatives what are the average impacts of sly mate change on our system. and we came one a list. having said this this is an average. hand in the refrigerator and oven and your hand in the middle but when you do scenario planning you have to look at what you're going to do for consequences. so increases in temperature, no changes in precipitation or the way we get precipitations and
no change in the precipitation. decreases in snow back of 50 percent and decrease to inflow and decreases in yield. that all assumes a static systems and our operators don't change dealing with flood pockets or rule curves so that's impact of operating the system like we have historically and that's impact on our system. the issue is from today on we can't operate the system the way we used to so we have to start changing and coming one new models on how to do it. >> this i have found this a phenomenal chart. if you start that upper left and go down line by line on this chart, it shows you the official demand forecast for the seattle city water supply system.
we have never - at least to date - underforecasted the demand. we always over forecast. i think if you have not looked at your official forecast it gives you a reality historically and what the demands really look like. i think also, if you have not look and i'm assuming most have, this is what our water consumption looks like verses our population increases. we have had significant population increases and our demand continues to decline two to two and a half percent a year. half retails and half wholesale customers, we're continue to see though it moderates, a decrease in demand. there's a significant amount of supply in your existing demand and you need to figure out how
to access that. if you look at peak day and average annual water and you look at peak there's a lot of room between those two lines. that's untapped supply and i could get 20 to 40 million gallons by pricing alone. just on the commercial and residential. if you look at supply people for get one the best way to do is price the slide and it gives you an opportunity and that's one reason we had the conservation in programs in pricing and a very aggressive tier pricing schedule which is the reason we're not using as much water as before. this is important because we're going to add something to this chart but we go through a forecast model that tries to predict on the demand side the impact on climate change.
we've done scenario planning and built in that the impacts of temperature on our demand which is primarily for us there's a direct for peak season in the summer and we're doing a very good job for that and we're now taking yield curve - the upper line, and how do we develop a confidence band around that so it also - we have a better feel for what our system can truly yield. the competence plan in some instances will hold increases supply in certain scenarios and depending on the way we manager our system it could change the system and depress demand. if we get high duration and short immre men tabs if we get that once a week our demand
goes down 30 to 40 million gallop as day. the other issue just if you have not looked, you ought to look at the relative use of water in the world up where the united states sits per capita verses australia, japan, russia, germany, china, pick your own country. various capacity in the system to deal with some of the impacts of climate change. so i think there's capacity there and something you out to look at. then finally, back to add ing a couple of issues to chart on here. one if you have not done it you should look at your financial systems and rate stability that now particularly to deal with rate increases in the future. you should be paying a lot of attention to where you are now
with rates. you need to keep flexible. the biggest problem i have now is people trying to solve my problems for me to invest in today to solve something 30 or 40 years from now and to make huge capitol investments today might not be the right approach and you need to all look at that in our own utilities. we need to react and not over-react and do things that don't make sense and cause our rate payer as lot of sense and are not going to contribute to solveg the problem. we're going to get a lot more information year by years we go forward. finally i would really reiterate what you really need to do is try and get control overall those things you know you can control.
that up certainty that currently is there. i would try to grab that and minimize that because the climate change is so uncertain you can't have or an afford to have other uncertainty in your system. thank you. [applause] >> good morning., i'm edward campbell and planning deck tore for portland oregon and i'm here on behalf of our water bureau who sends his regrets. i'm very glad to be here today before i start on the story of portland i want to say the morning session has painteded a picture for me of the scale of
issues you face here in california and i hope the story i tell you about portland which we are a drinking water only utility and 80 miles away from the pacific ocean that there are lessons that can be useful to you but our issues pale in comparison to the issues your dealing with here. first a quick description of our system. its the largest one in oregon serving about 8 hundred thousand people. 25 percent of the state and average a hundred million gallons of water a day. our primary source is the bowling river in the cascade mountains east of the city and two reservoirs and ten million gallons of usable storage.
we have a secondary ground storing source on the south side of the colombia river and we have capacity to serve our base needs just by ground water some you can count portland among those that believe climate change is real and have been following it for over two decades. the ctional is a national leader. i know i need to tread carefully in san francisco talking about treading in this area but most of you are probably familiar with the list i have up here on this slide. in terms of predicted impacts for continued global warming on western water utilities perhaps it is most fundamental. what we're really struggling with is the notion we may faced
increase demands in the summer with reduced supplies. so, in terms of climate change impacts portland is most concerned about. here are five according to me and my staff. i'm sure there's more and thinking on this i tried focus on things we're dealing with now. as i mentioned the higher summertime demand because of higher temperatures. this would be by growth alone and that's a significant issue. the other side of the coin with that is having less supply during the summer and if we're in a situation where we have a longer drought period we like seattle have annual refills with reservoirs and a summer
draw down where we're serving from our reservoirs if that presents challenges for us. increase in wild fires. it's a huge concern for us and i'm sure for like san francisco we're an unfiltered drinking source and our watershed is in the mountains where there's lots of reck rauks and eventhough it's protected and there's no entry allowed our watershed we're are neighbors of an intensely utilized effort. water rights issue is only issues with our ground source but we do share that series of,aquafo r's and we have the city of vancouver on the other
side that also taps that water reservoir. and fish flows we're currently in the process of pursuing habitat conservation plan to come in compliance in the clean water act so we're very concerned about any impact that could impact our ability to maintain fish flows we're currently agreeing to. next slide. so, in terms of what we've done to study climate change effects on our system. in 2002 through the university of washington through richard palmer and margaret hahn, i won't go over that now dash maybe later. next slide. a couple mayor studies we
conducted is a reduction of our snow pact. the bowling watershed is not a rich environment. we do regularly get snow fall and our highest elevation in there is about 2500 feet. what we do have is a dotted line showing our regular run off of the streams in the and the dark line shows projected what would happen without the snow fall. it's not particularly significant for our municipal supply. one of these reasons is for the late spring rain period. what we typically see is the snow fall that does shed is scoured out in late april and may site has a much bigger impact on